Radiator for internal-combustion engines



P. F. SPERY. RADIATOR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED OCT. 28, 1919.

1,349,01 1 Patented Aug. 10, 1920.

V I I INVENTOR: WITNESS.

' I PJLILMOREJR Spz'm,

ATTORNBYS.

- UNITED .STATES PATENT orFicE.

PHILMORE F. SPERY, OF CHICAGO, ILLINOI$J mnmron FOB. INTERNALCOMBUSTION enemas.

To all whom z'tmay concern Be it known that I, PHILMORE F. SPERY, a citizen of the United States, and resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Radiators for Internal- Combustion Engines;.and I do hereby declare that the following description of" my invention, taken in connection with the accompanying sheet of drawings,'forms a full, clear, and exact others I specification, which ,will enable skilled in the art to which the said invention a'ppertains to make and use the same.

This invention has general reference to improvements in radiators for motor driven vehicles in which the motive poweris derived from an internal combustion engine which is cooled bywater surrounding the cylinders, and which water is conducted to a device,'termed radiator, in WhlCh the water passes through air-cooled tubes to part with a portion of its heat, which water is then returned to the engine and thus circulates between the engine and the radiator.-

This invention is especially directed to the construction of these water tubes; and 1t consists, essentially, of the novel and peculiar combination of parts and details of construction, as hereinafter first fully set forth and described, and then pointed out in the claims.

The ob'ect of this invention is the production o a radiator possessing efficiency in a high degree, combined with simplicity of construction. It is an improvement upon' the device disclosed in the Letters Patent of the United States granted to me on the 23d day of September, 1919, No. 1,316,858; In the drawings forming a part of this specification Figure 1 is a plan view of a fragment of'a blank from which the fins for the water tubes are formed. Fig. 2 is a side elevation of a water tube to which the fins are attached. Fig. 3 is a front elevation of an associated pairof water tubes with their .radiating fins. Fig. 4 is .a plan ofa blank for radiator fins slightly modified; and Fig. 5 is a front elevation of a pair of water tubes supplied with the modified form of fins. Fig. 6 is a plan of a jig which is used in placing the fins onto the water tubes. Fig. 7 is a sectional view on line 7-7 of Fig. 6. Fig. 8 is an end elevation of this 31 bars 24. An end Specification of Letters Patent. Patented Aug, 10, 1920. Application filed'october as, 1919. Serial No. 334,038. A

, the various figures.

A, in the drawings designates the water tubes, and B, the fins associated therewith. These section and. perfectly smooth on their exterior surface. They are placed into a radiator core in parallel relationship, and spaced apart the proper distance. Each of these tubes is surrounded by a multiplicity of laterally extending fins; and these fins are constructed inthe following manner:

A ribbon of sheet metal, preferably copper or brass, oblong holes 12, equally spaced, and of a size to admit the tube A by a close fit. This strip is then punched in a suitably constructed die to afford elongated ovates 13, having parallel sides and approximately water tubes are'oblong in transverse is perforated with a series of semi-circular ends, in which the oblong holes 12 are centrally located. These elongated ovates constitute the fins,.and they are connected by strips or bars 14, of proper width, medially of their sides, as illustrated in Fig. 1. This fin-strip is then bent at right angles along the dotted lines 15, 16', and then again fiat dimension of the water tube and of' proper depth. This grooye 24 is crossed by a series of channels 25, 'of sufficient size to admit the elongated ovates, depressions 26, being alternately formed in one, and then in the opposite side walls of the groove 24 to admit the central portion 23 of the plate D, is removably secured at one end of the jig C, screws 27 When a strip of fins has been properly located in the jig C, a water tube A is pushed through the opening 28, in the end plate D and passed through all of the oblong openings 12 in the fins, the tubebein guided by the longitudinal groove 24, an

then the tube with its fins snugly held thereto, is removed from the jig and the end plate 7 D removed from the tube, and then the tube .2, andv preferably by bers 13*, which, while is dipped into a bath of molten solder, whereby all the fins are connected to the tube, the members 23 being located alter-.

and then at the other flat portions of the tube, thereby augmenting the adhesive connection of the fin with the tube, while-at the same time the portions 19, 20,of the bars 14 underlying t e portions nately on one,

I 21, 22, of the elongated ovates serve as rea proper number of water tubes are assembled, preferably in a clamping device similar to a printers chase and locked therein, and then the core is dipped with its face into a-bath of molten solder, and then reversed to treat'the back of the core'm the same manner. This clamping process has a tendency to disarrange the square openings by the fins sliding upon one another, it being borne in mind that these fins are formed of very thin metal; and to overcome thls tendency, a plain strip of metal 29, may be laced between adjacent ends of the fins, as illustrated in Figs. 3 and 5.

While I prefer the construct1on he1'e1nbefore described, owing to its efficiency, a slight change, however, may be made therein; and in Fig. 4 I show a fin strip in which the elongated ovates are the same as heretoforev described, but the distance between these ovates is shortened. This strip is bent at right angles along the dotted lines 30, 31, which brings the fins into parallel alinement so that the strip when placed into the 1 as tit m to receive the watertube. This construction has the members 34 connecting the members 35, 36, of the elongated ovates 1n the folded condition alternately at one, and then at the other, outer margins of the memit affords the square cellular formation, is not quite as strong and rigid as the preferred embodiment of refiuiring less metal than the former construction; and where the cost of a core is an item of consideration, may be usefully employed.

I have hereinbefore stated that the finsv of adjacent water tubes are separated by a plain flat bar; but it is' evident that when the water tubes are spaced sufiiciently apart that the fins cannot touch each other, this separating bar can be dispensed with without appreciably affecting the efficiency of the radiator.

A series of water tubes to make, the core hereinbefore, mentioned, is in condiinvention, but it has the advantage of for a radiator are always connected at their upper and lower ends to plates which form a part of the upper and lower water reser- I claim as new, and desire to secure to myself by Letters Patent of the United Statesc 1. A radiator core, comprising, 1n combination, a multiplicity of vertical water tubes in parallel spaced apart relationship, each of said water tubes being an oblong tube having smooth fiat sides and rounded edges, there being on said tube a series of laterally extending fins, said fins being elongated ovates having parallel sides and rounded ends, long openings fitting the water tubes by a tight fit, said fins being connected at their sidesby bars, said bars being bent and rebent to place the ovates into parallel alinement, said fins being connected to said tubes by being soldered thereto.

2. A radiator core, comprising, in combination, a multiplicity of vertical water tubes in parallel spaced apart relationship, each of said water tubes being an oblong tube having smooth flat sides and rounded edges, there being on said tube a series of laterally extending fins, said fins being elongated ovates having parallel sides and rounded ends, said fins being each perforated by oblong openings fitting the water tubes by a tight fit, said fins being connected medially of their sides by bars, said'bars being bent and rebent to place the ovates into parallel alinement, the middle portions of said bars being in close contact alternately with one, and then with the other flat side of the water tube, the whole being connected by solder.

3. A radiator core, comprising, in combination, .a multiplicity of vertical water tubes in parallel spaced relationship, each of said water tubes being oblong in cross section and having flat sides, there being on said water tubes laterally extending fins, said fins being elongated ovates having fiat sides and rounded ends, said' fins being connected medially of their sides, by bars, said bars being bent upon the sides of said fins from which they project, said fins having the medial portions of said bars contacting with said water tubes, adjacent water tubes having their fins separated by' plainflat strips of metalas described.

In testimony that I claim the foregoing as .my invention, I. have hereunto set my said fins being each perforated by ob- 

